[ServiceWorker] Use pageVisibilityState instead of visibilityState.

Source/modules/serviceworkers/ServiceWorkerContainer.cpp

Index: Source/modules/serviceworkers/ServiceWorkerContainer.cpp
diff --git a/Source/modules/serviceworkers/ServiceWorkerContainer.cpp b/Source/modules/serviceworkers/ServiceWorkerContainer.cpp
index 69de78ab319de14a36fcc472a8534124e09c0b43..df6f6a8b8d6d07d22a43ac1beffc5c4a0d534745 100644
--- a/Source/modules/serviceworkers/ServiceWorkerContainer.cpp
+++ b/Source/modules/serviceworkers/ServiceWorkerContainer.cpp
@@ -291,8 +291,6 @@ bool ServiceWorkerContainer::getClientInfo(WebServiceWorkerClientInfo* info)
     if (!context || !context->isDocument())
         return false;
     Document* document = toDocument(context);
-    // FIXME: remove info->visibilityState when Chromium is updated.
-    info->visibilityState = document->visibilityState();
     info->pageVisibilityState = static_cast<WebPageVisibilityState>(document->pageVisibilityState());
     info->isFocused = document->hasFocus();
     info->url = document->url();